Shock absorber



C. CALVEQT ET AL,

SHOCK- ABsoRBER Filed May 11. m21 -:esnmwm-snw. 1

f @um am@ Camera,

v c. CALVERT ET Al.L

SHOCK ABS ORBER Filed May vl1, 1921 2 Shouts-Isbn. 2

Patented Get. 21, 1924.

UNITED ST oFFicE.

'srrocir ABSORBER.

Application filed May 11, 1921.

This invention relates to shock absorbers 10 and its object is to provide vehicle springs with a swinging arm or yoke with'means to engage the lower side of a leaf spring or plate thereon as the said spring is compressed aiid to prevent the instant relaxation or rebound of the spring to its normal position and shape. The said lever or yoke is hung from the body of the Vehicle and preferably provided with some engaging means as a roller, to run over an inclined and undulating plate on the lower side of the spring and the lever or yoke is free to change its location when the distance between the axle and body of the vehicle is decreased.

These and other objects and details of the invention are more fully described in the following specification, Vset forth in the claims and illustrated in the accompanying drawings, wherein: Y

Fig. 1 isa side elevation of an elliptical spring showing the vlinvention applied thereto.

Fig. 2 is an end view of the same. f Fig. 3-is a detail view' of the engaging roller. f

Fig. l is a'niodiied form of employing duplicate yokes. v v

Fig-5 is a side elevation of a modified form of travel plate for the roller. Y

Fig. 6 is a modified form of the shock absorber. f Fig. 7 is another modied form 'of the device showing its adaptation to each end of the vehicle to prevent horizontal thrusts of the vehicle body.

Fig. 8 is a detail view of the compression spring for the bearing plate.

Fig. 9 is a cross sectional view through the end of the levers, the rollers and the bearing late. Y p Fig. 10 is the end view of the bearing plate shown in Fig. 6. l v he device is adapted to be applied to all springs where a jolt or a jar causes a vertical compression and where the same may be apthe invention Serial No. 468,513.

plied by pivoting certain parts to the body of the vehicle and allowed to swing as vthe spring is compressed or released.

To the frame 5 of the vehicle is pivoted a A yoke comprising the arms 6 adapted to swing on the bolt 7 and carrying at their lower ends the spindle 8 having ball bearing cones 9 and on which is supported the roller 10 having an outer bearing to travel over a plate 12. l

The spring 13 shown in Figs. V1 and 2, is secured-iii the usual manner to vthe vehicle frame at its upper side and' to the axle 14 at its lower side. upper end and secured to the outer end of the spring whileits lower end isy slotted for the passage of a bolt 15 which also retains an encircling spring 16 so that there shall lbe a certain freedom of action by the plate vwhen the spring is compressed. A small spring 17 is also interposed between the plate 12 and the spring 13.

As will be seen bythe dotted lines in Fig. l, when the spring is thus compressed, the arms 6 dropby gravity and assume an almost vertical position, theV centre of the roller 10 travelling on the dotted arc line.

When the arms of the yoke are thus located tlie roller 10 bears upon the lower end of the plate and on the rebound of the spring the lost play of the plate is Vrst taken up by the springs 16 and 17 when the presedge 11 that is free Theplate 12 is forked at its i' sureof the spring 13 is now thrown entirely upon the yoke and roller 10 which now begins to travel up the inclined plane or undulating surface of theV plate and appreciably retards the return ofthe spring.

In Fig. t is shown a modified form of absorber as may be applied to aY motor truck and' where the' ends of the spring 18 are carried by the end 19 of the chassis and the shackle 20'. A strap 21 may alsoV be secured at each of these points and carried over a saddle 22 beneath the axle, having a slot forthe passage of a bolt 23 and to allow a certain amount of play as the spring 18 is compressed. rlwo yokes with arms 241-v and 25 are here provided and havethe roller 26 which travclsover the inclined plate or strap 21 as the spring 18 is compressed andthe distance from the beam 5 and the axle 14 is decreased, and otherwise acting as above described.

Where two yokes are thus used it will be found advisable to unite the yokes together and overcome any friction that may be caused at the pivot 28 by rust, dirt or ice to check it.

H a spring is used whose rebound carries the roller lO up the plate 12 too suddenly,

the plate may be made as shown in Fig. 5 where the plate 30 is corrugated on its lower side, the undulations 31 serving to retard the movement of the reller and prevent too sudden upward movement of the spring and outware swing or' the yoke.

V plate 32 of limited length is shown in F ig. 6 and does not connect with the outer end of the spring 18 but has atree end'` 33 tha-t is supported by the coil spring 34- with hook ends to encircle the Spring 18 and the pla-te. This coil spring is shown enlarged in Fig. 8.

T ,e plate 32 is secured to the a-Xle 141 by means of the aws 35 and 36, the latter being removable and dovetailed the end of the plate as shown inV Fig. l0, while the iaws are clampedv to the axle by' the bolt 37.

ln Fig. 7 the absorber is shown as applied to the springs at each end oi ther chassis and illustrating how the horizontal thrust of the latter may be controlled by this invention'. It is a well known fact that the bulk of the vibrations andV :movements of a' vehicle body on its springs results froml the sudden check of its` momentum: by obstructions encountered by the wheels. llVhen the latter strikes a rock or a: depression and is momentarily cheeked the tendency of the heavy car body is to continue onward and considerable swaying and jol'ting tollows.

The levers 87 and 38 being set at opposite angles will tend to impede these longitudinal thrusts and restrain the movements: ot the car to the vertical only, or locking it between the rol-1ers or the two levers.

kA modified formV ot roller il is` show-n in Fig. 9 where twin rollers are seen onthe same spindle 39- and have cutting edges to break up mud or iee as they moveY along the bear-ing plate. l

It is obvious that the -yokes and rollers may be otherwise arranged and modi-tied without departing from the essential teatures above describedy or from the scope of the appended claims.

That we claim as new is:

l. ln a shock absorber, the combination of a spring, andV means pivoted above the said spring and retained in a partlf)7 elevated position near the outer end of the spring but adapted to tall by gravity beneath lthe spring when the latter is compressed and to be again forced to the outer end of the spring when it relaxes.

2. In ashock absorber, the combina-tion of a spring, a-nd means hung above the spring and normally supported at its outer end. but adapted to drop by gravity beneath the spring when the latter is compressed and confine it against rapid rebound when released.

3. In a shock absorber, the combination of a spring, and means hung above the said spring and adapted to drop under the same when compressedl and' confinel it against rapid rebound when released.

4. In a shock absorber, the'combination of a spring, and pivoted means hung above the spring and adapted to drop by gravity beneath the spring when the latter is conipressed but reta-rd its relaxing.

5; In a shock abs orberthe combination of a spring having an inclined plate on its lower side, a yoke pivotedy abo-ve the spring, and means carried at the lower end or' the yoke and adapted to travel over the plate.

6. In a shock absorber, the combination oi av vehicle frame, la spring beneath saine, a yoke pivotedV to the trame and adapted to straddle the spring, aplateA loosely heldf be neath Vthe spring, and a roller journalled in the lower yend of the yoke and adapted 'to moveY along the plate as the spring operates.

7. In a shock absorber, the combination olf a vehicle tra-me, a Spring beneath same, a yoke comprising armspivcted in the traine and adapted to stra-ddl'e the spring, an inclined plate hinged at its outerrendy of the spring and secured beneath said spring', a spindle journal-led in the lower ends ot the yoke and uniting the same, and ak reller on the spindle to travel over the pate.

8. In a shock absorber, the combination of a vehicle frame, a spring supporting same, an inclined corrugated plate beneath the spring, a yoke pivoted to the frame, and a roller in the lower end of the yokeY and adapted to. travel. over the plate/asthe spring is compressed and released.

9. ln a shock absorber, the combination ot' a vehicle body, a spring supporting the same, an inclined plate carriedv beneathV the spring, and means hung irom the said vehicle body and adapted to move down the inclined plate by gravity when the springl is compressed but retard its rebound' when thel spring is released.

10. In a shockabsorber, the combination of aspring supporting a vehicle body,.means pivoted on the vehicle body and adapted to swing towards a vertical line and under the spring as it is compressed, and meansadapted to return the pivoted means to its normal position when the spring is relaxed.

11. In a shock absorber, the combination of a spring supporti-ngl a vehicle body, an axle carrying the spring, means pivoted above said spring and adapted to drop towards; a verticalv line and under the spring when it is compressed, and` means carried by the aXle andada-pted toforce the pivoted means to its normalposition' whenv thel spring is relaxed.

12. In a shock absorber, the combination ity When the springs compressed and be `of a. spring adapted to support a vehicle forced up the same When the spring rebody, an axle carrying the spring, an nbounds. 10 clined plate carried by the axle and beneath In testimony whereof We hereunto afX 5 the lower side of the spring, and means our signatures.

pvoted to the body of the vehicle and adept- CECIL CALVERT. ed to travel down the inclined plate by grav- JAMES F. DUHAMEL. 

